package com.map;

import java.util.HashMap;
import java.util.Map;

/**
 * @Author: fxy
 * @Date: 2022/04/22/10:20
 * @Description:
 */
public class Test1 {
    public static void main(String[] args) {
        Map map = new HashMap<>();
        map.put("k1","v1");
        System.out.println(map.get("k2"));
    }
}
